<template>
    <div style="">
        <my-simple-table>

            <my-simple-tr label="基础功能">
                <el-upload class="upload-demo" action="https://jsonplaceholder.typicode.com/posts/"
                           :on-preview="handlePreview" :on-remove="handleRemove" :before-remove="beforeRemove"
                           multiple :limit="3" :on-exceed="handleExceed" :file-list="fileList">
                    <el-button type="primary" size="small">点击上传</el-button>
                    <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                </el-upload>
            </my-simple-tr>

            <my-simple-tr label="用户头像上传">
                <el-upload
                        class="avatar-uploader"
                        action="https://jsonplaceholder.typicode.com/posts/"
                        :show-file-list="false"
                        :on-success="handleAvatarSuccess"
                        :before-upload="beforeAvatarUpload">
                    <img v-if="imageUrl" :src="imageUrl" class="avatar">
                    <i v-else class="el-icon-plus avatar-uploader-icon"></i>
                </el-upload>
            </my-simple-tr>

            <my-simple-tr label="照片墙">
                <el-upload
                        action="https://jsonplaceholder.typicode.com/posts/"
                        list-type="picture-card"
                        :on-preview="handlePictureCardPreview"
                        :on-remove="handleRemove">
                    <i class="el-icon-plus"></i>
                </el-upload>
                <el-dialog :visible.sync="dialogVisible">
                    <img width="100%" :src="dialogImageUrl" alt="">
                </el-dialog>
            </my-simple-tr>

            <my-simple-tr label="文件缩略图">
                <el-upload
                        action="#"
                        list-type="picture-card"
                        :auto-upload="false">
                    <i slot="default" class="el-icon-plus"></i>
                    <div slot="file" slot-scope="{file}">
                        <img  class="el-upload-list__item-thumbnail" :src="file.url" alt="">
                        <span class="el-upload-list__item-actions">
                        <span  class="el-upload-list__item-preview"  @click="handlePictureCardPreview(file)">
                          <i class="el-icon-zoom-in"></i>
                        </span>
                        <span  v-if="!disabled"  class="el-upload-list__item-delete"  @click="handleDownload(file)" >
                          <i class="el-icon-download"></i>
                        </span>
                        <span  v-if="!disabled" class="el-upload-list__item-delete" @click="handleRemove(file)">
                          <i class="el-icon-delete"></i>
                        </span>
                      </span>
                    </div>
                </el-upload>
                <el-dialog :visible.sync="dialogVisible">
                    <img width="100%" :src="dialogImageUrl" alt="">
                </el-dialog>
            </my-simple-tr>

            <my-simple-tr label="图片列表缩略图">
                <el-upload
                        class="upload-demo"
                        action="https://jsonplaceholder.typicode.com/posts/"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        :file-list="fileList"
                        list-type="picture">
                    <el-button size="small" type="primary">点击上传</el-button>
                    <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                </el-upload>
            </my-simple-tr>

            <my-simple-tr label="上传文件列表控制">
                <el-upload
                        class="upload-demo"
                        action="https://jsonplaceholder.typicode.com/posts/"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        :file-list="fileList"
                        list-type="picture">
                    <el-button size="small" type="primary">点击上传</el-button>
                    <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                </el-upload>
            </my-simple-tr>

        </my-simple-table>
    </div>
</template>

<style>
    .avatar-uploader .el-upload {
        border: 1px dashed #d9d9d9;
        border-radius: 6px;
        cursor: pointer;
        position: relative;
        overflow: hidden;
    }

    .avatar-uploader .el-upload:hover {
        border-color: #409EFF;
    }

    .avatar-uploader-icon {
        font-size: 28px;
        color: #8c939d;
        width: 178px;
        height: 178px;
        line-height: 178px;
        text-align: center;
    }

    .avatar {
        width: 178px;
        height: 178px;
        display: block;
    }
</style>

<script>
    export default {
        data() {
            return {
                imageUrl: '',
                dialogImageUrl: '',
                dialogVisible: false,
                dialogVisible: false,
                disabled: false,
                fileList: [{
                    name: 'food.jpeg',
                    url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'
                }, {
                    name: 'food2.jpeg',
                    url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'
                }]
            };
        },
        methods: {
            handleRemove(file, fileList) {
                console.log(file, fileList);
            },
            handlePreview(file) {
                console.log(file);
            },
            handleExceed(files, fileList) {
                this.$message.warning(`当前限制选择 3 个文件，本次选择了 ${files.length} 个文件，共选择了 ${files.length + fileList.length} 个文件`);
            },
            beforeRemove(file, fileList) {
                return this.$confirm(`确定移除 ${file.name}？`);
            },
            handleAvatarSuccess(res, file) {
                this.imageUrl = URL.createObjectURL(file.raw);
            },
            beforeAvatarUpload(file) {
                const isJPG = file.type === 'image/jpeg';
                const isLt2M = file.size / 1024 / 1024 < 2;

                if (!isJPG) {
                    this.$message.error('上传头像图片只能是 JPG 格式!');
                }
                if (!isLt2M) {
                    this.$message.error('上传头像图片大小不能超过 2MB!');
                }
                return isJPG && isLt2M;
            },
            handlePictureCardPreview(file) {
                this.dialogImageUrl = file.url;
                this.dialogVisible = true;
            },
            handleDownload(file) {
                console.log(file);
            }
        }
    }
</script>

